Alert archive / Maryland / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 1, 2023, 6:58 PM EDT for Kent County, New Castle County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 47 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 1, 2023, 6:58 PM EDT (22:58 UTC)
- Expired
- Apr 1, 2023, 7:45 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 62 km from the middle of the area, began a volume at 22:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 1, 7:15 PM EDT | TSTM WND DMG | Chestertown, MD | REPORTS OF SEVERAL TREES DOWN ACROSS KENT COUNTY. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 1, 5:30 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 136 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 648 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 448 m²/s²
- 0-3 km storm-relative helicity
- 443 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
831
WUUS51 KPHI 012258
SVRPHI
DEC001-003-MDC011-029-035-012345-
/O.NEW.KPHI.SV.W.0013.230401T2258Z-230401T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
658 PM EDT Sat Apr 1 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northern Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
Kent County in northeastern Maryland...
* Until 745 PM EDT.
* At 658 PM EDT, severe thunderstorms were located along a line
extending from Mount Pleasant to Morgnec to near Rock Hall, moving
east at 65 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Dover, Middletown, Smyrna, Chestertown, Centreville, Camden,
Clayton, Cheswold, Church Hill, Millington, Sudlersville, Hartly,
Old Town, Rising Sun-Lebanon, Hazlettville, Morgnec, Delaney
Corner, Dover Base Housing, Crumpton and Dover Speedway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
&&
LAT...LON 3937 7593 3936 7588 3938 7582 3938 7577
3947 7577 3929 7541 3908 7541 3905 7624
3909 7623 3913 7625
TIME...MOT...LOC 2258Z 262DEG 59KT 3952 7572 3926 7602 3910 7623
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB2 follow-up statements
493
WWUS51 KPHI 012308
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
708 PM EDT Sat Apr 1 2023
DEC001-003-MDC011-029-035-012345-
/O.CON.KPHI.SV.W.0013.000000T0000Z-230401T2345Z/
New Castle DE-Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
708 PM EDT Sat Apr 1 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHERN KENT...NORTHEASTERN QUEEN
ANNE'S...NORTHEASTERN CAROLINE AND KENT COUNTIES...
At 707 PM EDT, severe thunderstorms were located along a line
extending from Port Penn to Millington to near Old Town, moving east
at 70 mph.
HAZARD...70 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Dover, Middletown, Smyrna, Chestertown, Centreville, Camden, Clayton,
Cheswold, Church Hill, Millington, Sudlersville, Hartly, Old Town,
Rising Sun-Lebanon, Hazlettville, Morgnec, Delaney Corner, Dover Base
Housing, Crumpton and Dover Speedway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3937 7593 3936 7588 3938 7582 3938 7577
3947 7577 3929 7541 3908 7541 3905 7624
3909 7623 3913 7625
TIME...MOT...LOC 2307Z 262DEG 59KT 3954 7556 3928 7586 3912 7607
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MLB331
WWUS51 KPHI 012330
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
730 PM EDT Sat Apr 1 2023
DEC001-003-MDC011-029-035-012345-
/O.CON.KPHI.SV.W.0013.000000T0000Z-230401T2345Z/
New Castle DE-Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
730 PM EDT Sat Apr 1 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHERN KENT...NORTHEASTERN QUEEN
ANNE'S...NORTHEASTERN CAROLINE AND CENTRAL KENT COUNTIES...
At 730 PM EDT, severe thunderstorms were located along a line
extending from near Elmer to near Woodland Beach to near
Hazlettville, moving east at 70 mph.
HAZARD...70 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Dover, Middletown, Smyrna, Camden, Clayton, Cheswold, Church Hill,
Millington, Sudlersville, Hartly, Old Town, Rising Sun-Lebanon,
Hazlettville, Delaney Corner, Dover Base Housing, Crumpton, Dover
Speedway, Sassafras, Green Spring and Rising Sun.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3913 7620 3924 7599 3936 7588 3938 7582
3938 7577 3947 7577 3929 7541 3908 7541
3906 7621
TIME...MOT...LOC 2330Z 262DEG 59KT 3959 7512 3933 7542 3917 7563
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 37 min |
| Apr 1, 6:01 PM EDT | Tornado Warning | PHI | Kent, Sussex | 29 min |
| Apr 1, 6:22 PM EDT | Tornado Warning | PHI | Sussex | 23 min |
| Apr 1, 6:33 PM EDT | Tornado Warning | PHI | New Castle | 27 min |
| Apr 1, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 51 min |
| Apr 1, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 40 min |
| Apr 1, 7:36 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 39 min |
| Apr 1, 7:50 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 40 min |
| Apr 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 32 min |
| Apr 1, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 26 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2023Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.